Mountains near Curitiba, Brazil.
Mountains near Curitiba, Brazil.

After five years of expeditions into cloud forests, scientists in southeastern Brazil have discovered seven new tiny frog species on seven different mountains. Each of the frogs are less than 1cm long when fully grown and have colourful, poisonous skin with various textures. The high, fertile forests of the area yield more different species per square kilometer than the Amazon. Read more: bbc.com

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